28157467 has 4 divisors (see below), whose sum is σ = 30323440. Its totient is φ = 25991496.

The previous prime is 28157461. The next prime is 28157477. The reversal of 28157467 is 76475182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28157467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28157461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082967 + ... + 1082992.

It is an arithmetic number, because the mean of its divisors is an integer number (7580860).

Almost surely, 2^28157467 is an apocalyptic number.

28157467 is a deficient number, since it is larger than the sum of its proper divisors (2165973).

28157467 is a wasteful number, since it uses less digits than its factorization.

28157467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165972.

The product of its digits is 94080, while the sum is 40.

The square root of 28157467 is about 5306.3609941277. The cubic root of 28157467 is about 304.2270745433.

The spelling of 28157467 in words is "twenty-eight million, one hundred fifty-seven thousand, four hundred sixty-seven".